1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #ifdef SMP 50 #include <sys/sched.h> 51 #endif 52 #include <sys/smp.h> 53 #include <sys/timetc.h> 54 55 #if defined(__i386__) || defined(__amd64__) 56 #include <machine/pci_cfgreg.h> 57 #endif 58 #include <machine/resource.h> 59 #include <machine/bus.h> 60 #include <sys/rman.h> 61 #include <isa/isavar.h> 62 #include <isa/pnpvar.h> 63 64 #include <contrib/dev/acpica/acpi.h> 65 #include <dev/acpica/acpivar.h> 66 #include <dev/acpica/acpiio.h> 67 #include <contrib/dev/acpica/achware.h> 68 #include <contrib/dev/acpica/acnamesp.h> 69 70 #include "pci_if.h" 71 #include <dev/pci/pcivar.h> 72 #include <dev/pci/pci_private.h> 73 74 #include <vm/vm_param.h> 75 76 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 77 78 /* Hooks for the ACPI CA debugging infrastructure */ 79 #define _COMPONENT ACPI_BUS 80 ACPI_MODULE_NAME("ACPI") 81 82 static d_open_t acpiopen; 83 static d_close_t acpiclose; 84 static d_ioctl_t acpiioctl; 85 86 static struct cdevsw acpi_cdevsw = { 87 .d_version = D_VERSION, 88 .d_open = acpiopen, 89 .d_close = acpiclose, 90 .d_ioctl = acpiioctl, 91 .d_name = "acpi", 92 }; 93 94 /* Global mutex for locking access to the ACPI subsystem. */ 95 struct mtx acpi_mutex; 96 97 /* Bitmap of device quirks. */ 98 int acpi_quirks; 99 100 static int acpi_modevent(struct module *mod, int event, void *junk); 101 static int acpi_probe(device_t dev); 102 static int acpi_attach(device_t dev); 103 static int acpi_suspend(device_t dev); 104 static int acpi_resume(device_t dev); 105 static int acpi_shutdown(device_t dev); 106 static device_t acpi_add_child(device_t bus, int order, const char *name, 107 int unit); 108 static int acpi_print_child(device_t bus, device_t child); 109 static void acpi_probe_nomatch(device_t bus, device_t child); 110 static void acpi_driver_added(device_t dev, driver_t *driver); 111 static int acpi_read_ivar(device_t dev, device_t child, int index, 112 uintptr_t *result); 113 static int acpi_write_ivar(device_t dev, device_t child, int index, 114 uintptr_t value); 115 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 116 static int acpi_sysres_alloc(device_t dev); 117 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 118 int type, int *rid, u_long start, u_long end, 119 u_long count, u_int flags); 120 static int acpi_release_resource(device_t bus, device_t child, int type, 121 int rid, struct resource *r); 122 static void acpi_delete_resource(device_t bus, device_t child, int type, 123 int rid); 124 static uint32_t acpi_isa_get_logicalid(device_t dev); 125 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 126 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 127 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 128 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 129 ACPI_BUFFER *ret); 130 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 131 int *dstate); 132 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 133 void *context, void **retval); 134 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 135 int max_depth, acpi_scan_cb_t user_fn, void *arg); 136 static int acpi_set_powerstate_method(device_t bus, device_t child, 137 int state); 138 static int acpi_isa_pnp_probe(device_t bus, device_t child, 139 struct isa_pnp_id *ids); 140 static void acpi_probe_children(device_t bus); 141 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 142 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 143 void *context, void **status); 144 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 145 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 146 static void acpi_shutdown_final(void *arg, int howto); 147 static void acpi_enable_fixed_events(struct acpi_softc *sc); 148 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 149 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 150 static int acpi_wake_prep_walk(int sstate); 151 static int acpi_wake_sysctl_walk(device_t dev); 152 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 153 static void acpi_system_eventhandler_sleep(void *arg, int state); 154 static void acpi_system_eventhandler_wakeup(void *arg, int state); 155 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 156 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 157 static int acpi_pm_func(u_long cmd, void *arg, ...); 158 static int acpi_child_location_str_method(device_t acdev, device_t child, 159 char *buf, size_t buflen); 160 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 161 char *buf, size_t buflen); 162 #if defined(__i386__) || defined(__amd64__) 163 static void acpi_enable_pcie(void); 164 #endif 165 static void acpi_hint_device_unit(device_t acdev, device_t child, 166 const char *name, int *unitp); 167 168 static device_method_t acpi_methods[] = { 169 /* Device interface */ 170 DEVMETHOD(device_probe, acpi_probe), 171 DEVMETHOD(device_attach, acpi_attach), 172 DEVMETHOD(device_shutdown, acpi_shutdown), 173 DEVMETHOD(device_detach, bus_generic_detach), 174 DEVMETHOD(device_suspend, acpi_suspend), 175 DEVMETHOD(device_resume, acpi_resume), 176 177 /* Bus interface */ 178 DEVMETHOD(bus_add_child, acpi_add_child), 179 DEVMETHOD(bus_print_child, acpi_print_child), 180 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 181 DEVMETHOD(bus_driver_added, acpi_driver_added), 182 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 183 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 184 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 185 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 186 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 187 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 188 DEVMETHOD(bus_release_resource, acpi_release_resource), 189 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 190 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 191 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 192 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 193 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 194 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 195 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 196 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 197 198 /* ACPI bus */ 199 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 200 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 201 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 202 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 203 204 /* PCI emulation */ 205 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 206 207 /* ISA emulation */ 208 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 209 210 {0, 0} 211 }; 212 213 static driver_t acpi_driver = { 214 "acpi", 215 acpi_methods, 216 sizeof(struct acpi_softc), 217 }; 218 219 static devclass_t acpi_devclass; 220 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 221 MODULE_VERSION(acpi, 1); 222 223 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 224 225 /* Local pools for managing system resources for ACPI child devices. */ 226 static struct rman acpi_rman_io, acpi_rman_mem; 227 228 #define ACPI_MINIMUM_AWAKETIME 5 229 230 static const char* sleep_state_names[] = { 231 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 232 233 /* Holds the description of the acpi0 device. */ 234 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 235 236 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 237 static char acpi_ca_version[12]; 238 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 239 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 240 241 /* 242 * Allow override of whether methods execute in parallel or not. 243 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 244 * errors for AML that really can't handle parallel method execution. 245 * It is off by default since this breaks recursive methods and 246 * some IBMs use such code. 247 */ 248 static int acpi_serialize_methods; 249 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 250 251 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 252 static int acpi_do_powerstate = 1; 253 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 254 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 255 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 256 257 /* Reset system clock while resuming. XXX Remove once tested. */ 258 static int acpi_reset_clock = 1; 259 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 260 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 261 &acpi_reset_clock, 1, "Reset system clock while resuming."); 262 263 /* Allow users to override quirks. */ 264 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 265 266 static int acpi_susp_bounce; 267 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 268 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 269 270 /* 271 * ACPI can only be loaded as a module by the loader; activating it after 272 * system bootstrap time is not useful, and can be fatal to the system. 273 * It also cannot be unloaded, since the entire system bus hierarchy hangs 274 * off it. 275 */ 276 static int 277 acpi_modevent(struct module *mod, int event, void *junk) 278 { 279 switch (event) { 280 case MOD_LOAD: 281 if (!cold) { 282 printf("The ACPI driver cannot be loaded after boot.\n"); 283 return (EPERM); 284 } 285 break; 286 case MOD_UNLOAD: 287 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 288 return (EBUSY); 289 break; 290 default: 291 break; 292 } 293 return (0); 294 } 295 296 /* 297 * Perform early initialization. 298 */ 299 ACPI_STATUS 300 acpi_Startup(void) 301 { 302 static int started = 0; 303 ACPI_STATUS status; 304 int val; 305 306 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 307 308 /* Only run the startup code once. The MADT driver also calls this. */ 309 if (started) 310 return_VALUE (AE_OK); 311 started = 1; 312 313 /* 314 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 315 * if more tables exist. 316 */ 317 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 318 printf("ACPI: Table initialisation failed: %s\n", 319 AcpiFormatException(status)); 320 return_VALUE (status); 321 } 322 323 /* Set up any quirks we have for this system. */ 324 if (acpi_quirks == ACPI_Q_OK) 325 acpi_table_quirks(&acpi_quirks); 326 327 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 328 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 329 acpi_quirks &= ~ACPI_Q_BROKEN; 330 if (acpi_quirks & ACPI_Q_BROKEN) { 331 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 332 status = AE_SUPPORT; 333 } 334 335 return_VALUE (status); 336 } 337 338 /* 339 * Detect ACPI and perform early initialisation. 340 */ 341 int 342 acpi_identify(void) 343 { 344 ACPI_TABLE_RSDP *rsdp; 345 ACPI_TABLE_HEADER *rsdt; 346 ACPI_PHYSICAL_ADDRESS paddr; 347 struct sbuf sb; 348 349 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 350 351 if (!cold) 352 return (ENXIO); 353 354 /* Check that we haven't been disabled with a hint. */ 355 if (resource_disabled("acpi", 0)) 356 return (ENXIO); 357 358 /* Check for other PM systems. */ 359 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 360 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 361 printf("ACPI identify failed, other PM system enabled.\n"); 362 return (ENXIO); 363 } 364 365 /* Initialize root tables. */ 366 if (ACPI_FAILURE(acpi_Startup())) { 367 printf("ACPI: Try disabling either ACPI or apic support.\n"); 368 return (ENXIO); 369 } 370 371 if ((paddr = AcpiOsGetRootPointer()) == 0 || 372 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 373 return (ENXIO); 374 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 375 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 376 else 377 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 378 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 379 380 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 381 return (ENXIO); 382 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 383 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 384 sbuf_trim(&sb); 385 sbuf_putc(&sb, ' '); 386 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 387 sbuf_trim(&sb); 388 sbuf_finish(&sb); 389 sbuf_delete(&sb); 390 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 391 392 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 393 394 return (0); 395 } 396 397 /* 398 * Fetch some descriptive data from ACPI to put in our attach message. 399 */ 400 static int 401 acpi_probe(device_t dev) 402 { 403 404 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 405 406 device_set_desc(dev, acpi_desc); 407 408 return_VALUE (0); 409 } 410 411 static int 412 acpi_attach(device_t dev) 413 { 414 struct acpi_softc *sc; 415 ACPI_TABLE_FACS *facs; 416 ACPI_STATUS status; 417 int error, state; 418 UINT32 flags; 419 UINT8 TypeA, TypeB; 420 char *env; 421 422 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 423 424 sc = device_get_softc(dev); 425 sc->acpi_dev = dev; 426 callout_init(&sc->susp_force_to, TRUE); 427 428 error = ENXIO; 429 430 /* Initialize resource manager. */ 431 acpi_rman_io.rm_type = RMAN_ARRAY; 432 acpi_rman_io.rm_start = 0; 433 acpi_rman_io.rm_end = 0xffff; 434 acpi_rman_io.rm_descr = "ACPI I/O ports"; 435 if (rman_init(&acpi_rman_io) != 0) 436 panic("acpi rman_init IO ports failed"); 437 acpi_rman_mem.rm_type = RMAN_ARRAY; 438 acpi_rman_mem.rm_start = 0; 439 acpi_rman_mem.rm_end = ~0ul; 440 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 441 if (rman_init(&acpi_rman_mem) != 0) 442 panic("acpi rman_init memory failed"); 443 444 /* Initialise the ACPI mutex */ 445 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 446 447 /* 448 * Set the globals from our tunables. This is needed because ACPI-CA 449 * uses UINT8 for some values and we have no tunable_byte. 450 */ 451 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 452 AcpiGbl_EnableInterpreterSlack = TRUE; 453 454 /* Start up the ACPI CA subsystem. */ 455 status = AcpiInitializeSubsystem(); 456 if (ACPI_FAILURE(status)) { 457 device_printf(dev, "Could not initialize Subsystem: %s\n", 458 AcpiFormatException(status)); 459 goto out; 460 } 461 462 /* Load ACPI name space. */ 463 status = AcpiLoadTables(); 464 if (ACPI_FAILURE(status)) { 465 device_printf(dev, "Could not load Namespace: %s\n", 466 AcpiFormatException(status)); 467 goto out; 468 } 469 470 #if defined(__i386__) || defined(__amd64__) 471 /* Handle MCFG table if present. */ 472 acpi_enable_pcie(); 473 #endif 474 475 /* Install the default address space handlers. */ 476 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 477 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 478 if (ACPI_FAILURE(status)) { 479 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 480 AcpiFormatException(status)); 481 goto out; 482 } 483 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 484 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 485 if (ACPI_FAILURE(status)) { 486 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 487 AcpiFormatException(status)); 488 goto out; 489 } 490 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 491 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 492 if (ACPI_FAILURE(status)) { 493 device_printf(dev, "could not initialise PciConfig handler: %s\n", 494 AcpiFormatException(status)); 495 goto out; 496 } 497 498 /* 499 * Note that some systems (specifically, those with namespace evaluation 500 * issues that require the avoidance of parts of the namespace) must 501 * avoid running _INI and _STA on everything, as well as dodging the final 502 * object init pass. 503 * 504 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 505 * 506 * XXX We should arrange for the object init pass after we have attached 507 * all our child devices, but on many systems it works here. 508 */ 509 flags = 0; 510 if (testenv("debug.acpi.avoid")) 511 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 512 513 /* Bring the hardware and basic handlers online. */ 514 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 515 device_printf(dev, "Could not enable ACPI: %s\n", 516 AcpiFormatException(status)); 517 goto out; 518 } 519 520 /* 521 * Call the ECDT probe function to provide EC functionality before 522 * the namespace has been evaluated. 523 * 524 * XXX This happens before the sysresource devices have been probed and 525 * attached so its resources come from nexus0. In practice, this isn't 526 * a problem but should be addressed eventually. 527 */ 528 acpi_ec_ecdt_probe(dev); 529 530 /* Bring device objects and regions online. */ 531 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 532 device_printf(dev, "Could not initialize ACPI objects: %s\n", 533 AcpiFormatException(status)); 534 goto out; 535 } 536 537 /* 538 * Setup our sysctl tree. 539 * 540 * XXX: This doesn't check to make sure that none of these fail. 541 */ 542 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 543 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 544 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 545 device_get_name(dev), CTLFLAG_RD, 0, ""); 546 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 547 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 548 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 549 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 550 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 551 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 552 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 553 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 554 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 555 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 556 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 557 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 558 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 559 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 560 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 561 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 562 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 563 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 564 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 565 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 566 "sleep delay"); 567 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 568 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 569 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 571 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 573 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 574 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 575 OID_AUTO, "handle_reboot", CTLFLAG_RW, 576 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 577 578 /* 579 * Default to 1 second before sleeping to give some machines time to 580 * stabilize. 581 */ 582 sc->acpi_sleep_delay = 1; 583 if (bootverbose) 584 sc->acpi_verbose = 1; 585 if ((env = getenv("hw.acpi.verbose")) != NULL) { 586 if (strcmp(env, "0") != 0) 587 sc->acpi_verbose = 1; 588 freeenv(env); 589 } 590 591 /* Only enable S4BIOS by default if the FACS says it is available. */ 592 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs); 593 if (ACPI_FAILURE(status)) { 594 device_printf(dev, "couldn't get FACS: %s\n", 595 AcpiFormatException(status)); 596 error = ENXIO; 597 goto out; 598 } 599 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT) 600 sc->acpi_s4bios = 1; 601 602 /* 603 * Dispatch the default sleep state to devices. The lid switch is set 604 * to NONE by default to avoid surprising users. 605 */ 606 sc->acpi_power_button_sx = ACPI_STATE_S5; 607 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 608 sc->acpi_standby_sx = ACPI_STATE_S1; 609 sc->acpi_suspend_sx = ACPI_STATE_S3; 610 611 /* Pick the first valid sleep state for the sleep button default. */ 612 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 613 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 614 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 615 sc->acpi_sleep_button_sx = state; 616 break; 617 } 618 619 acpi_enable_fixed_events(sc); 620 621 /* 622 * Scan the namespace and attach/initialise children. 623 */ 624 625 /* Register our shutdown handler. */ 626 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 627 SHUTDOWN_PRI_LAST); 628 629 /* 630 * Register our acpi event handlers. 631 * XXX should be configurable eg. via userland policy manager. 632 */ 633 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 634 sc, ACPI_EVENT_PRI_LAST); 635 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 636 sc, ACPI_EVENT_PRI_LAST); 637 638 /* Flag our initial states. */ 639 sc->acpi_enabled = 1; 640 sc->acpi_sstate = ACPI_STATE_S0; 641 sc->acpi_sleep_disabled = 0; 642 643 /* Create the control device */ 644 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 645 "acpi"); 646 sc->acpi_dev_t->si_drv1 = sc; 647 648 if ((error = acpi_machdep_init(dev))) 649 goto out; 650 651 /* Register ACPI again to pass the correct argument of pm_func. */ 652 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 653 654 if (!acpi_disabled("bus")) 655 acpi_probe_children(dev); 656 657 error = 0; 658 659 out: 660 return_VALUE (error); 661 } 662 663 static int 664 acpi_suspend(device_t dev) 665 { 666 device_t child, *devlist; 667 int error, i, numdevs, pstate; 668 669 GIANT_REQUIRED; 670 671 /* First give child devices a chance to suspend. */ 672 error = bus_generic_suspend(dev); 673 if (error) 674 return (error); 675 676 /* 677 * Now, set them into the appropriate power state, usually D3. If the 678 * device has an _SxD method for the next sleep state, use that power 679 * state instead. 680 */ 681 error = device_get_children(dev, &devlist, &numdevs); 682 if (error) 683 return (error); 684 for (i = 0; i < numdevs; i++) { 685 /* If the device is not attached, we've powered it down elsewhere. */ 686 child = devlist[i]; 687 if (!device_is_attached(child)) 688 continue; 689 690 /* 691 * Default to D3 for all sleep states. The _SxD method is optional 692 * so set the powerstate even if it's absent. 693 */ 694 pstate = PCI_POWERSTATE_D3; 695 error = acpi_device_pwr_for_sleep(device_get_parent(child), 696 child, &pstate); 697 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 698 pci_set_powerstate(child, pstate); 699 } 700 free(devlist, M_TEMP); 701 error = 0; 702 703 return (error); 704 } 705 706 static int 707 acpi_resume(device_t dev) 708 { 709 ACPI_HANDLE handle; 710 int i, numdevs, error; 711 device_t child, *devlist; 712 713 GIANT_REQUIRED; 714 715 /* 716 * Put all devices in D0 before resuming them. Call _S0D on each one 717 * since some systems expect this. 718 */ 719 error = device_get_children(dev, &devlist, &numdevs); 720 if (error) 721 return (error); 722 for (i = 0; i < numdevs; i++) { 723 child = devlist[i]; 724 handle = acpi_get_handle(child); 725 if (handle) 726 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 727 if (device_is_attached(child) && acpi_do_powerstate) 728 pci_set_powerstate(child, PCI_POWERSTATE_D0); 729 } 730 free(devlist, M_TEMP); 731 732 return (bus_generic_resume(dev)); 733 } 734 735 static int 736 acpi_shutdown(device_t dev) 737 { 738 739 GIANT_REQUIRED; 740 741 /* Allow children to shutdown first. */ 742 bus_generic_shutdown(dev); 743 744 /* 745 * Enable any GPEs that are able to power-on the system (i.e., RTC). 746 * Also, disable any that are not valid for this state (most). 747 */ 748 acpi_wake_prep_walk(ACPI_STATE_S5); 749 750 return (0); 751 } 752 753 /* 754 * Handle a new device being added 755 */ 756 static device_t 757 acpi_add_child(device_t bus, int order, const char *name, int unit) 758 { 759 struct acpi_device *ad; 760 device_t child; 761 762 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 763 return (NULL); 764 765 resource_list_init(&ad->ad_rl); 766 767 child = device_add_child_ordered(bus, order, name, unit); 768 if (child != NULL) 769 device_set_ivars(child, ad); 770 else 771 free(ad, M_ACPIDEV); 772 return (child); 773 } 774 775 static int 776 acpi_print_child(device_t bus, device_t child) 777 { 778 struct acpi_device *adev = device_get_ivars(child); 779 struct resource_list *rl = &adev->ad_rl; 780 int retval = 0; 781 782 retval += bus_print_child_header(bus, child); 783 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 784 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 785 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 786 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 787 if (device_get_flags(child)) 788 retval += printf(" flags %#x", device_get_flags(child)); 789 retval += bus_print_child_footer(bus, child); 790 791 return (retval); 792 } 793 794 /* 795 * If this device is an ACPI child but no one claimed it, attempt 796 * to power it off. We'll power it back up when a driver is added. 797 * 798 * XXX Disabled for now since many necessary devices (like fdc and 799 * ATA) don't claim the devices we created for them but still expect 800 * them to be powered up. 801 */ 802 static void 803 acpi_probe_nomatch(device_t bus, device_t child) 804 { 805 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 806 pci_set_powerstate(child, PCI_POWERSTATE_D3); 807 #endif 808 } 809 810 /* 811 * If a new driver has a chance to probe a child, first power it up. 812 * 813 * XXX Disabled for now (see acpi_probe_nomatch for details). 814 */ 815 static void 816 acpi_driver_added(device_t dev, driver_t *driver) 817 { 818 device_t child, *devlist; 819 int i, numdevs; 820 821 DEVICE_IDENTIFY(driver, dev); 822 if (device_get_children(dev, &devlist, &numdevs)) 823 return; 824 for (i = 0; i < numdevs; i++) { 825 child = devlist[i]; 826 if (device_get_state(child) == DS_NOTPRESENT) { 827 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 828 pci_set_powerstate(child, PCI_POWERSTATE_D0); 829 if (device_probe_and_attach(child) != 0) 830 pci_set_powerstate(child, PCI_POWERSTATE_D3); 831 #else 832 device_probe_and_attach(child); 833 #endif 834 } 835 } 836 free(devlist, M_TEMP); 837 } 838 839 /* Location hint for devctl(8) */ 840 static int 841 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 842 size_t buflen) 843 { 844 struct acpi_device *dinfo = device_get_ivars(child); 845 846 if (dinfo->ad_handle) 847 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 848 else 849 snprintf(buf, buflen, "unknown"); 850 return (0); 851 } 852 853 /* PnP information for devctl(8) */ 854 static int 855 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 856 size_t buflen) 857 { 858 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 859 ACPI_DEVICE_INFO *adinfo; 860 struct acpi_device *dinfo = device_get_ivars(child); 861 char *end; 862 int error; 863 864 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 865 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 866 if (error) 867 snprintf(buf, buflen, "unknown"); 868 else 869 snprintf(buf, buflen, "_HID=%s _UID=%lu", 870 (adinfo->Valid & ACPI_VALID_HID) ? 871 adinfo->HardwareId.Value : "none", 872 (adinfo->Valid & ACPI_VALID_UID) ? 873 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 874 if (adinfo) 875 AcpiOsFree(adinfo); 876 877 return (0); 878 } 879 880 /* 881 * Handle per-device ivars 882 */ 883 static int 884 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 885 { 886 struct acpi_device *ad; 887 888 if ((ad = device_get_ivars(child)) == NULL) { 889 printf("device has no ivars\n"); 890 return (ENOENT); 891 } 892 893 /* ACPI and ISA compatibility ivars */ 894 switch(index) { 895 case ACPI_IVAR_HANDLE: 896 *(ACPI_HANDLE *)result = ad->ad_handle; 897 break; 898 case ACPI_IVAR_MAGIC: 899 *(uintptr_t *)result = ad->ad_magic; 900 break; 901 case ACPI_IVAR_PRIVATE: 902 *(void **)result = ad->ad_private; 903 break; 904 case ACPI_IVAR_FLAGS: 905 *(int *)result = ad->ad_flags; 906 break; 907 case ISA_IVAR_VENDORID: 908 case ISA_IVAR_SERIAL: 909 case ISA_IVAR_COMPATID: 910 *(int *)result = -1; 911 break; 912 case ISA_IVAR_LOGICALID: 913 *(int *)result = acpi_isa_get_logicalid(child); 914 break; 915 default: 916 return (ENOENT); 917 } 918 919 return (0); 920 } 921 922 static int 923 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 924 { 925 struct acpi_device *ad; 926 927 if ((ad = device_get_ivars(child)) == NULL) { 928 printf("device has no ivars\n"); 929 return (ENOENT); 930 } 931 932 switch(index) { 933 case ACPI_IVAR_HANDLE: 934 ad->ad_handle = (ACPI_HANDLE)value; 935 break; 936 case ACPI_IVAR_MAGIC: 937 ad->ad_magic = (uintptr_t)value; 938 break; 939 case ACPI_IVAR_PRIVATE: 940 ad->ad_private = (void *)value; 941 break; 942 case ACPI_IVAR_FLAGS: 943 ad->ad_flags = (int)value; 944 break; 945 default: 946 panic("bad ivar write request (%d)", index); 947 return (ENOENT); 948 } 949 950 return (0); 951 } 952 953 /* 954 * Handle child resource allocation/removal 955 */ 956 static struct resource_list * 957 acpi_get_rlist(device_t dev, device_t child) 958 { 959 struct acpi_device *ad; 960 961 ad = device_get_ivars(child); 962 return (&ad->ad_rl); 963 } 964 965 static int 966 acpi_match_resource_hint(device_t dev, int type, long value) 967 { 968 struct acpi_device *ad = device_get_ivars(dev); 969 struct resource_list *rl = &ad->ad_rl; 970 struct resource_list_entry *rle; 971 972 STAILQ_FOREACH(rle, rl, link) { 973 if (rle->type != type) 974 continue; 975 if (rle->start <= value && rle->end >= value) 976 return (1); 977 } 978 return (0); 979 } 980 981 /* 982 * Wire device unit numbers based on resource matches in hints. 983 */ 984 static void 985 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 986 int *unitp) 987 { 988 const char *s; 989 long value; 990 int line, matches, unit; 991 992 /* 993 * Iterate over all the hints for the devices with the specified 994 * name to see if one's resources are a subset of this device. 995 */ 996 line = 0; 997 for (;;) { 998 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 999 break; 1000 1001 /* Must have an "at" for acpi or isa. */ 1002 resource_string_value(name, unit, "at", &s); 1003 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1004 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1005 continue; 1006 1007 /* 1008 * Check for matching resources. We must have at least one, 1009 * and all resources specified have to match. 1010 * 1011 * XXX: We may want to revisit this to be more lenient and wire 1012 * as long as it gets one match. 1013 */ 1014 matches = 0; 1015 if (resource_long_value(name, unit, "port", &value) == 0) { 1016 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1017 matches++; 1018 else 1019 continue; 1020 } 1021 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1022 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1023 matches++; 1024 else 1025 continue; 1026 } 1027 if (resource_long_value(name, unit, "irq", &value) == 0) { 1028 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1029 matches++; 1030 else 1031 continue; 1032 } 1033 if (resource_long_value(name, unit, "drq", &value) == 0) { 1034 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1035 matches++; 1036 else 1037 continue; 1038 } 1039 1040 if (matches > 0) { 1041 /* We have a winner! */ 1042 *unitp = unit; 1043 break; 1044 } 1045 } 1046 } 1047 1048 /* 1049 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1050 * duplicates, we merge any in the sysresource attach routine. 1051 */ 1052 static int 1053 acpi_sysres_alloc(device_t dev) 1054 { 1055 struct resource *res; 1056 struct resource_list *rl; 1057 struct resource_list_entry *rle; 1058 struct rman *rm; 1059 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1060 device_t *children; 1061 int child_count, i; 1062 1063 /* 1064 * Probe/attach any sysresource devices. This would be unnecessary if we 1065 * had multi-pass probe/attach. 1066 */ 1067 if (device_get_children(dev, &children, &child_count) != 0) 1068 return (ENXIO); 1069 for (i = 0; i < child_count; i++) { 1070 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1071 device_probe_and_attach(children[i]); 1072 } 1073 free(children, M_TEMP); 1074 1075 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1076 STAILQ_FOREACH(rle, rl, link) { 1077 if (rle->res != NULL) { 1078 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1079 continue; 1080 } 1081 1082 /* Only memory and IO resources are valid here. */ 1083 switch (rle->type) { 1084 case SYS_RES_IOPORT: 1085 rm = &acpi_rman_io; 1086 break; 1087 case SYS_RES_MEMORY: 1088 rm = &acpi_rman_mem; 1089 break; 1090 default: 1091 continue; 1092 } 1093 1094 /* Pre-allocate resource and add to our rman pool. */ 1095 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1096 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1097 if (res != NULL) { 1098 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1099 rle->res = res; 1100 } else 1101 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1102 rle->start, rle->count, rle->type); 1103 } 1104 return (0); 1105 } 1106 1107 static struct resource * 1108 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1109 u_long start, u_long end, u_long count, u_int flags) 1110 { 1111 ACPI_RESOURCE ares; 1112 struct acpi_device *ad = device_get_ivars(child); 1113 struct resource_list *rl = &ad->ad_rl; 1114 struct resource_list_entry *rle; 1115 struct resource *res; 1116 struct rman *rm; 1117 1118 res = NULL; 1119 1120 /* We only handle memory and IO resources through rman. */ 1121 switch (type) { 1122 case SYS_RES_IOPORT: 1123 rm = &acpi_rman_io; 1124 break; 1125 case SYS_RES_MEMORY: 1126 rm = &acpi_rman_mem; 1127 break; 1128 default: 1129 rm = NULL; 1130 } 1131 1132 ACPI_SERIAL_BEGIN(acpi); 1133 1134 /* 1135 * If this is an allocation of the "default" range for a given RID, and 1136 * we know what the resources for this device are (i.e., they're on the 1137 * child's resource list), use those start/end values. 1138 */ 1139 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1140 rle = resource_list_find(rl, type, *rid); 1141 if (rle == NULL) 1142 goto out; 1143 start = rle->start; 1144 end = rle->end; 1145 count = rle->count; 1146 } 1147 1148 /* 1149 * If this is an allocation of a specific range, see if we can satisfy 1150 * the request from our system resource regions. If we can't, pass the 1151 * request up to the parent. 1152 */ 1153 if (start + count - 1 == end && rm != NULL) 1154 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1155 child); 1156 if (res == NULL) { 1157 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1158 start, end, count, flags); 1159 } else { 1160 rman_set_rid(res, *rid); 1161 1162 /* If requested, activate the resource using the parent's method. */ 1163 if (flags & RF_ACTIVE) 1164 if (bus_activate_resource(child, type, *rid, res) != 0) { 1165 rman_release_resource(res); 1166 res = NULL; 1167 goto out; 1168 } 1169 } 1170 1171 if (res != NULL && device_get_parent(child) == bus) 1172 switch (type) { 1173 case SYS_RES_IRQ: 1174 /* 1175 * Since bus_config_intr() takes immediate effect, we cannot 1176 * configure the interrupt associated with a device when we 1177 * parse the resources but have to defer it until a driver 1178 * actually allocates the interrupt via bus_alloc_resource(). 1179 * 1180 * XXX: Should we handle the lookup failing? 1181 */ 1182 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1183 acpi_config_intr(child, &ares); 1184 break; 1185 } 1186 1187 out: 1188 ACPI_SERIAL_END(acpi); 1189 return (res); 1190 } 1191 1192 static int 1193 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1194 struct resource *r) 1195 { 1196 struct rman *rm; 1197 int ret; 1198 1199 /* We only handle memory and IO resources through rman. */ 1200 switch (type) { 1201 case SYS_RES_IOPORT: 1202 rm = &acpi_rman_io; 1203 break; 1204 case SYS_RES_MEMORY: 1205 rm = &acpi_rman_mem; 1206 break; 1207 default: 1208 rm = NULL; 1209 } 1210 1211 ACPI_SERIAL_BEGIN(acpi); 1212 1213 /* 1214 * If this resource belongs to one of our internal managers, 1215 * deactivate it and release it to the local pool. If it doesn't, 1216 * pass this request up to the parent. 1217 */ 1218 if (rm != NULL && rman_is_region_manager(r, rm)) { 1219 if (rman_get_flags(r) & RF_ACTIVE) { 1220 ret = bus_deactivate_resource(child, type, rid, r); 1221 if (ret != 0) 1222 goto out; 1223 } 1224 ret = rman_release_resource(r); 1225 } else 1226 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1227 1228 out: 1229 ACPI_SERIAL_END(acpi); 1230 return (ret); 1231 } 1232 1233 static void 1234 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1235 { 1236 struct resource_list *rl; 1237 1238 rl = acpi_get_rlist(bus, child); 1239 resource_list_delete(rl, type, rid); 1240 } 1241 1242 /* Allocate an IO port or memory resource, given its GAS. */ 1243 int 1244 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1245 struct resource **res, u_int flags) 1246 { 1247 int error, res_type; 1248 1249 error = ENOMEM; 1250 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1251 return (EINVAL); 1252 1253 /* We only support memory and IO spaces. */ 1254 switch (gas->SpaceId) { 1255 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1256 res_type = SYS_RES_MEMORY; 1257 break; 1258 case ACPI_ADR_SPACE_SYSTEM_IO: 1259 res_type = SYS_RES_IOPORT; 1260 break; 1261 default: 1262 return (EOPNOTSUPP); 1263 } 1264 1265 /* 1266 * If the register width is less than 8, assume the BIOS author means 1267 * it is a bit field and just allocate a byte. 1268 */ 1269 if (gas->BitWidth && gas->BitWidth < 8) 1270 gas->BitWidth = 8; 1271 1272 /* Validate the address after we're sure we support the space. */ 1273 if (gas->Address == 0 || gas->BitWidth == 0) 1274 return (EINVAL); 1275 1276 bus_set_resource(dev, res_type, *rid, gas->Address, 1277 gas->BitWidth / 8); 1278 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1279 if (*res != NULL) { 1280 *type = res_type; 1281 error = 0; 1282 } else 1283 bus_delete_resource(dev, res_type, *rid); 1284 1285 return (error); 1286 } 1287 1288 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1289 static uint32_t 1290 acpi_isa_get_logicalid(device_t dev) 1291 { 1292 ACPI_DEVICE_INFO *devinfo; 1293 ACPI_BUFFER buf; 1294 ACPI_HANDLE h; 1295 ACPI_STATUS error; 1296 u_int32_t pnpid; 1297 1298 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1299 1300 pnpid = 0; 1301 buf.Pointer = NULL; 1302 buf.Length = ACPI_ALLOCATE_BUFFER; 1303 1304 /* Fetch and validate the HID. */ 1305 if ((h = acpi_get_handle(dev)) == NULL) 1306 goto out; 1307 error = AcpiGetObjectInfo(h, &buf); 1308 if (ACPI_FAILURE(error)) 1309 goto out; 1310 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1311 1312 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1313 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1314 1315 out: 1316 if (buf.Pointer != NULL) 1317 AcpiOsFree(buf.Pointer); 1318 return_VALUE (pnpid); 1319 } 1320 1321 static int 1322 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1323 { 1324 ACPI_DEVICE_INFO *devinfo; 1325 ACPI_BUFFER buf; 1326 ACPI_HANDLE h; 1327 ACPI_STATUS error; 1328 uint32_t *pnpid; 1329 int valid, i; 1330 1331 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1332 1333 pnpid = cids; 1334 valid = 0; 1335 buf.Pointer = NULL; 1336 buf.Length = ACPI_ALLOCATE_BUFFER; 1337 1338 /* Fetch and validate the CID */ 1339 if ((h = acpi_get_handle(dev)) == NULL) 1340 goto out; 1341 error = AcpiGetObjectInfo(h, &buf); 1342 if (ACPI_FAILURE(error)) 1343 goto out; 1344 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1345 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1346 goto out; 1347 1348 if (devinfo->CompatibilityId.Count < count) 1349 count = devinfo->CompatibilityId.Count; 1350 for (i = 0; i < count; i++) { 1351 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1352 continue; 1353 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1354 valid++; 1355 } 1356 1357 out: 1358 if (buf.Pointer != NULL) 1359 AcpiOsFree(buf.Pointer); 1360 return_VALUE (valid); 1361 } 1362 1363 static char * 1364 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1365 { 1366 ACPI_HANDLE h; 1367 int i; 1368 1369 h = acpi_get_handle(dev); 1370 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1371 return (NULL); 1372 1373 /* Try to match one of the array of IDs with a HID or CID. */ 1374 for (i = 0; ids[i] != NULL; i++) { 1375 if (acpi_MatchHid(h, ids[i])) 1376 return (ids[i]); 1377 } 1378 return (NULL); 1379 } 1380 1381 static ACPI_STATUS 1382 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1383 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1384 { 1385 ACPI_HANDLE h; 1386 1387 if (dev == NULL) 1388 h = ACPI_ROOT_OBJECT; 1389 else if ((h = acpi_get_handle(dev)) == NULL) 1390 return (AE_BAD_PARAMETER); 1391 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1392 } 1393 1394 static int 1395 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1396 { 1397 struct acpi_softc *sc; 1398 ACPI_HANDLE handle; 1399 ACPI_STATUS status; 1400 char sxd[8]; 1401 int error; 1402 1403 sc = device_get_softc(bus); 1404 handle = acpi_get_handle(dev); 1405 1406 /* 1407 * XXX If we find these devices, don't try to power them down. 1408 * The serial and IRDA ports on my T23 hang the system when 1409 * set to D3 and it appears that such legacy devices may 1410 * need special handling in their drivers. 1411 */ 1412 if (handle == NULL || 1413 acpi_MatchHid(handle, "PNP0500") || 1414 acpi_MatchHid(handle, "PNP0501") || 1415 acpi_MatchHid(handle, "PNP0502") || 1416 acpi_MatchHid(handle, "PNP0510") || 1417 acpi_MatchHid(handle, "PNP0511")) 1418 return (ENXIO); 1419 1420 /* 1421 * Override next state with the value from _SxD, if present. If no 1422 * dstate argument was provided, don't fetch the return value. 1423 */ 1424 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1425 if (dstate) 1426 status = acpi_GetInteger(handle, sxd, dstate); 1427 else 1428 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1429 1430 switch (status) { 1431 case AE_OK: 1432 error = 0; 1433 break; 1434 case AE_NOT_FOUND: 1435 error = ESRCH; 1436 break; 1437 default: 1438 error = ENXIO; 1439 break; 1440 } 1441 1442 return (error); 1443 } 1444 1445 /* Callback arg for our implementation of walking the namespace. */ 1446 struct acpi_device_scan_ctx { 1447 acpi_scan_cb_t user_fn; 1448 void *arg; 1449 ACPI_HANDLE parent; 1450 }; 1451 1452 static ACPI_STATUS 1453 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1454 { 1455 struct acpi_device_scan_ctx *ctx; 1456 device_t dev, old_dev; 1457 ACPI_STATUS status; 1458 ACPI_OBJECT_TYPE type; 1459 1460 /* 1461 * Skip this device if we think we'll have trouble with it or it is 1462 * the parent where the scan began. 1463 */ 1464 ctx = (struct acpi_device_scan_ctx *)arg; 1465 if (acpi_avoid(h) || h == ctx->parent) 1466 return (AE_OK); 1467 1468 /* If this is not a valid device type (e.g., a method), skip it. */ 1469 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1470 return (AE_OK); 1471 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1472 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1473 return (AE_OK); 1474 1475 /* 1476 * Call the user function with the current device. If it is unchanged 1477 * afterwards, return. Otherwise, we update the handle to the new dev. 1478 */ 1479 old_dev = acpi_get_device(h); 1480 dev = old_dev; 1481 status = ctx->user_fn(h, &dev, level, ctx->arg); 1482 if (ACPI_FAILURE(status) || old_dev == dev) 1483 return (status); 1484 1485 /* Remove the old child and its connection to the handle. */ 1486 if (old_dev != NULL) { 1487 device_delete_child(device_get_parent(old_dev), old_dev); 1488 AcpiDetachData(h, acpi_fake_objhandler); 1489 } 1490 1491 /* Recreate the handle association if the user created a device. */ 1492 if (dev != NULL) 1493 AcpiAttachData(h, acpi_fake_objhandler, dev); 1494 1495 return (AE_OK); 1496 } 1497 1498 static ACPI_STATUS 1499 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1500 acpi_scan_cb_t user_fn, void *arg) 1501 { 1502 ACPI_HANDLE h; 1503 struct acpi_device_scan_ctx ctx; 1504 1505 if (acpi_disabled("children")) 1506 return (AE_OK); 1507 1508 if (dev == NULL) 1509 h = ACPI_ROOT_OBJECT; 1510 else if ((h = acpi_get_handle(dev)) == NULL) 1511 return (AE_BAD_PARAMETER); 1512 ctx.user_fn = user_fn; 1513 ctx.arg = arg; 1514 ctx.parent = h; 1515 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1516 acpi_device_scan_cb, &ctx, NULL)); 1517 } 1518 1519 /* 1520 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1521 * device power states since it's close enough to ACPI. 1522 */ 1523 static int 1524 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1525 { 1526 ACPI_HANDLE h; 1527 ACPI_STATUS status; 1528 int error; 1529 1530 error = 0; 1531 h = acpi_get_handle(child); 1532 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1533 return (EINVAL); 1534 if (h == NULL) 1535 return (0); 1536 1537 /* Ignore errors if the power methods aren't present. */ 1538 status = acpi_pwr_switch_consumer(h, state); 1539 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1540 && status != AE_BAD_PARAMETER) 1541 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1542 state, acpi_name(h), AcpiFormatException(status)); 1543 1544 return (error); 1545 } 1546 1547 static int 1548 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1549 { 1550 int result, cid_count, i; 1551 uint32_t lid, cids[8]; 1552 1553 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1554 1555 /* 1556 * ISA-style drivers attached to ACPI may persist and 1557 * probe manually if we return ENOENT. We never want 1558 * that to happen, so don't ever return it. 1559 */ 1560 result = ENXIO; 1561 1562 /* Scan the supplied IDs for a match */ 1563 lid = acpi_isa_get_logicalid(child); 1564 cid_count = acpi_isa_get_compatid(child, cids, 8); 1565 while (ids && ids->ip_id) { 1566 if (lid == ids->ip_id) { 1567 result = 0; 1568 goto out; 1569 } 1570 for (i = 0; i < cid_count; i++) { 1571 if (cids[i] == ids->ip_id) { 1572 result = 0; 1573 goto out; 1574 } 1575 } 1576 ids++; 1577 } 1578 1579 out: 1580 if (result == 0 && ids->ip_desc) 1581 device_set_desc(child, ids->ip_desc); 1582 1583 return_VALUE (result); 1584 } 1585 1586 #if defined(__i386__) || defined(__amd64__) 1587 /* 1588 * Look for a MCFG table. If it is present, use the settings for 1589 * domain (segment) 0 to setup PCI config space access via the memory 1590 * map. 1591 */ 1592 static void 1593 acpi_enable_pcie(void) 1594 { 1595 ACPI_TABLE_HEADER *hdr; 1596 ACPI_MCFG_ALLOCATION *alloc, *end; 1597 ACPI_STATUS status; 1598 1599 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1600 if (ACPI_FAILURE(status)) 1601 return; 1602 1603 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1604 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1605 while (alloc < end) { 1606 if (alloc->PciSegment == 0) { 1607 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1608 alloc->EndBusNumber); 1609 return; 1610 } 1611 alloc++; 1612 } 1613 } 1614 #endif 1615 1616 /* 1617 * Scan all of the ACPI namespace and attach child devices. 1618 * 1619 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1620 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1621 * However, in violation of the spec, some systems place their PCI link 1622 * devices in \, so we have to walk the whole namespace. We check the 1623 * type of namespace nodes, so this should be ok. 1624 */ 1625 static void 1626 acpi_probe_children(device_t bus) 1627 { 1628 1629 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1630 1631 /* 1632 * Scan the namespace and insert placeholders for all the devices that 1633 * we find. We also probe/attach any early devices. 1634 * 1635 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1636 * we want to create nodes for all devices, not just those that are 1637 * currently present. (This assumes that we don't want to create/remove 1638 * devices as they appear, which might be smarter.) 1639 */ 1640 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1641 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1642 bus, NULL); 1643 1644 /* Pre-allocate resources for our rman from any sysresource devices. */ 1645 acpi_sysres_alloc(bus); 1646 1647 /* Create any static children by calling device identify methods. */ 1648 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1649 bus_generic_probe(bus); 1650 1651 /* Probe/attach all children, created staticly and from the namespace. */ 1652 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1653 bus_generic_attach(bus); 1654 1655 /* 1656 * Some of these children may have attached others as part of their attach 1657 * process (eg. the root PCI bus driver), so rescan. 1658 */ 1659 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1660 bus_generic_attach(bus); 1661 1662 /* Attach wake sysctls. */ 1663 acpi_wake_sysctl_walk(bus); 1664 1665 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1666 return_VOID; 1667 } 1668 1669 /* 1670 * Determine the probe order for a given device. 1671 */ 1672 static void 1673 acpi_probe_order(ACPI_HANDLE handle, int *order) 1674 { 1675 ACPI_OBJECT_TYPE type; 1676 1677 /* 1678 * 1. I/O port and memory system resource holders 1679 * 2. Embedded controllers (to handle early accesses) 1680 * 3. PCI Link Devices 1681 * 100000. CPUs 1682 */ 1683 AcpiGetType(handle, &type); 1684 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1685 *order = 1; 1686 else if (acpi_MatchHid(handle, "PNP0C09")) 1687 *order = 2; 1688 else if (acpi_MatchHid(handle, "PNP0C0F")) 1689 *order = 3; 1690 else if (type == ACPI_TYPE_PROCESSOR) 1691 *order = 100000; 1692 } 1693 1694 /* 1695 * Evaluate a child device and determine whether we might attach a device to 1696 * it. 1697 */ 1698 static ACPI_STATUS 1699 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1700 { 1701 ACPI_OBJECT_TYPE type; 1702 ACPI_HANDLE h; 1703 device_t bus, child; 1704 int order; 1705 char *handle_str, **search; 1706 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1707 1708 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1709 1710 /* Skip this device if we think we'll have trouble with it. */ 1711 if (acpi_avoid(handle)) 1712 return_ACPI_STATUS (AE_OK); 1713 1714 bus = (device_t)context; 1715 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1716 switch (type) { 1717 case ACPI_TYPE_DEVICE: 1718 case ACPI_TYPE_PROCESSOR: 1719 case ACPI_TYPE_THERMAL: 1720 case ACPI_TYPE_POWER: 1721 if (acpi_disabled("children")) 1722 break; 1723 1724 /* 1725 * Since we scan from \, be sure to skip system scope objects. 1726 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1727 */ 1728 handle_str = acpi_name(handle); 1729 for (search = scopes; *search != NULL; search++) { 1730 if (strcmp(handle_str, *search) == 0) 1731 break; 1732 } 1733 if (*search != NULL) 1734 break; 1735 1736 /* 1737 * Create a placeholder device for this node. Sort the 1738 * placeholder so that the probe/attach passes will run 1739 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1740 * are reserved for special objects (i.e., system 1741 * resources). CPU devices have a very high order to 1742 * ensure they are probed after other devices. 1743 */ 1744 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1745 order = level * 10 + 100; 1746 acpi_probe_order(handle, &order); 1747 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1748 if (child == NULL) 1749 break; 1750 1751 /* Associate the handle with the device_t and vice versa. */ 1752 acpi_set_handle(child, handle); 1753 AcpiAttachData(handle, acpi_fake_objhandler, child); 1754 1755 /* 1756 * Check that the device is present. If it's not present, 1757 * leave it disabled (so that we have a device_t attached to 1758 * the handle, but we don't probe it). 1759 * 1760 * XXX PCI link devices sometimes report "present" but not 1761 * "functional" (i.e. if disabled). Go ahead and probe them 1762 * anyway since we may enable them later. 1763 */ 1764 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1765 /* Never disable PCI link devices. */ 1766 if (acpi_MatchHid(handle, "PNP0C0F")) 1767 break; 1768 /* 1769 * Docking stations should remain enabled since the system 1770 * may be undocked at boot. 1771 */ 1772 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1773 break; 1774 1775 device_disable(child); 1776 break; 1777 } 1778 1779 /* 1780 * Get the device's resource settings and attach them. 1781 * Note that if the device has _PRS but no _CRS, we need 1782 * to decide when it's appropriate to try to configure the 1783 * device. Ignore the return value here; it's OK for the 1784 * device not to have any resources. 1785 */ 1786 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1787 break; 1788 } 1789 } 1790 1791 return_ACPI_STATUS (AE_OK); 1792 } 1793 1794 /* 1795 * AcpiAttachData() requires an object handler but never uses it. This is a 1796 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1797 */ 1798 void 1799 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1800 { 1801 } 1802 1803 static void 1804 acpi_shutdown_final(void *arg, int howto) 1805 { 1806 struct acpi_softc *sc; 1807 ACPI_STATUS status; 1808 1809 /* 1810 * XXX Shutdown code should only run on the BSP (cpuid 0). 1811 * Some chipsets do not power off the system correctly if called from 1812 * an AP. 1813 */ 1814 sc = arg; 1815 if ((howto & RB_POWEROFF) != 0) { 1816 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1817 if (ACPI_FAILURE(status)) { 1818 printf("AcpiEnterSleepStatePrep failed - %s\n", 1819 AcpiFormatException(status)); 1820 return; 1821 } 1822 printf("Powering system off using ACPI\n"); 1823 ACPI_DISABLE_IRQS(); 1824 status = AcpiEnterSleepState(ACPI_STATE_S5); 1825 if (ACPI_FAILURE(status)) { 1826 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1827 } else { 1828 DELAY(1000000); 1829 printf("ACPI power-off failed - timeout\n"); 1830 } 1831 } else if ((howto & RB_HALT) == 0 && 1832 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1833 sc->acpi_handle_reboot) { 1834 /* Reboot using the reset register. */ 1835 status = AcpiHwLowLevelWrite( 1836 AcpiGbl_FADT.ResetRegister.BitWidth, 1837 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1838 if (ACPI_FAILURE(status)) { 1839 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1840 } else { 1841 DELAY(1000000); 1842 printf("ACPI reset failed - timeout\n"); 1843 } 1844 } else if (sc->acpi_do_disable && panicstr == NULL) { 1845 /* 1846 * Only disable ACPI if the user requested. On some systems, writing 1847 * the disable value to SMI_CMD hangs the system. 1848 */ 1849 printf("Shutting down ACPI\n"); 1850 AcpiTerminate(); 1851 } 1852 } 1853 1854 static void 1855 acpi_enable_fixed_events(struct acpi_softc *sc) 1856 { 1857 static int first_time = 1; 1858 1859 /* Enable and clear fixed events and install handlers. */ 1860 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1861 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1862 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1863 acpi_event_power_button_sleep, sc); 1864 if (first_time) 1865 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1866 } 1867 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1868 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1869 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1870 acpi_event_sleep_button_sleep, sc); 1871 if (first_time) 1872 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1873 } 1874 1875 first_time = 0; 1876 } 1877 1878 /* 1879 * Returns true if the device is actually present and should 1880 * be attached to. This requires the present, enabled, UI-visible 1881 * and diagnostics-passed bits to be set. 1882 */ 1883 BOOLEAN 1884 acpi_DeviceIsPresent(device_t dev) 1885 { 1886 ACPI_DEVICE_INFO *devinfo; 1887 ACPI_HANDLE h; 1888 ACPI_BUFFER buf; 1889 ACPI_STATUS error; 1890 int ret; 1891 1892 ret = FALSE; 1893 if ((h = acpi_get_handle(dev)) == NULL) 1894 return (FALSE); 1895 buf.Pointer = NULL; 1896 buf.Length = ACPI_ALLOCATE_BUFFER; 1897 error = AcpiGetObjectInfo(h, &buf); 1898 if (ACPI_FAILURE(error)) 1899 return (FALSE); 1900 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1901 1902 /* If no _STA method, must be present */ 1903 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1904 ret = TRUE; 1905 1906 /* Return true for 'present' and 'functioning' */ 1907 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1908 ret = TRUE; 1909 1910 AcpiOsFree(buf.Pointer); 1911 return (ret); 1912 } 1913 1914 /* 1915 * Returns true if the battery is actually present and inserted. 1916 */ 1917 BOOLEAN 1918 acpi_BatteryIsPresent(device_t dev) 1919 { 1920 ACPI_DEVICE_INFO *devinfo; 1921 ACPI_HANDLE h; 1922 ACPI_BUFFER buf; 1923 ACPI_STATUS error; 1924 int ret; 1925 1926 ret = FALSE; 1927 if ((h = acpi_get_handle(dev)) == NULL) 1928 return (FALSE); 1929 buf.Pointer = NULL; 1930 buf.Length = ACPI_ALLOCATE_BUFFER; 1931 error = AcpiGetObjectInfo(h, &buf); 1932 if (ACPI_FAILURE(error)) 1933 return (FALSE); 1934 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1935 1936 /* If no _STA method, must be present */ 1937 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1938 ret = TRUE; 1939 1940 /* Return true for 'present', 'battery present', and 'functioning' */ 1941 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1942 ret = TRUE; 1943 1944 AcpiOsFree(buf.Pointer); 1945 return (ret); 1946 } 1947 1948 /* 1949 * Match a HID string against a handle 1950 */ 1951 static BOOLEAN 1952 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1953 { 1954 ACPI_DEVICE_INFO *devinfo; 1955 ACPI_BUFFER buf; 1956 ACPI_STATUS error; 1957 int ret, i; 1958 1959 ret = FALSE; 1960 if (hid == NULL || h == NULL) 1961 return (ret); 1962 buf.Pointer = NULL; 1963 buf.Length = ACPI_ALLOCATE_BUFFER; 1964 error = AcpiGetObjectInfo(h, &buf); 1965 if (ACPI_FAILURE(error)) 1966 return (ret); 1967 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1968 1969 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1970 strcmp(hid, devinfo->HardwareId.Value) == 0) 1971 ret = TRUE; 1972 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1973 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1974 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1975 ret = TRUE; 1976 break; 1977 } 1978 } 1979 } 1980 1981 AcpiOsFree(buf.Pointer); 1982 return (ret); 1983 } 1984 1985 /* 1986 * Return the handle of a named object within our scope, ie. that of (parent) 1987 * or one if its parents. 1988 */ 1989 ACPI_STATUS 1990 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1991 { 1992 ACPI_HANDLE r; 1993 ACPI_STATUS status; 1994 1995 /* Walk back up the tree to the root */ 1996 for (;;) { 1997 status = AcpiGetHandle(parent, path, &r); 1998 if (ACPI_SUCCESS(status)) { 1999 *result = r; 2000 return (AE_OK); 2001 } 2002 /* XXX Return error here? */ 2003 if (status != AE_NOT_FOUND) 2004 return (AE_OK); 2005 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2006 return (AE_NOT_FOUND); 2007 parent = r; 2008 } 2009 } 2010 2011 /* Find the difference between two PM tick counts. */ 2012 uint32_t 2013 acpi_TimerDelta(uint32_t end, uint32_t start) 2014 { 2015 uint32_t delta; 2016 2017 if (end >= start) 2018 delta = end - start; 2019 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 2020 delta = ((0xFFFFFFFF - start) + end + 1); 2021 else 2022 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 2023 return (delta); 2024 } 2025 2026 /* 2027 * Allocate a buffer with a preset data size. 2028 */ 2029 ACPI_BUFFER * 2030 acpi_AllocBuffer(int size) 2031 { 2032 ACPI_BUFFER *buf; 2033 2034 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2035 return (NULL); 2036 buf->Length = size; 2037 buf->Pointer = (void *)(buf + 1); 2038 return (buf); 2039 } 2040 2041 ACPI_STATUS 2042 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2043 { 2044 ACPI_OBJECT arg1; 2045 ACPI_OBJECT_LIST args; 2046 2047 arg1.Type = ACPI_TYPE_INTEGER; 2048 arg1.Integer.Value = number; 2049 args.Count = 1; 2050 args.Pointer = &arg1; 2051 2052 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2053 } 2054 2055 /* 2056 * Evaluate a path that should return an integer. 2057 */ 2058 ACPI_STATUS 2059 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2060 { 2061 ACPI_STATUS status; 2062 ACPI_BUFFER buf; 2063 ACPI_OBJECT param; 2064 2065 if (handle == NULL) 2066 handle = ACPI_ROOT_OBJECT; 2067 2068 /* 2069 * Assume that what we've been pointed at is an Integer object, or 2070 * a method that will return an Integer. 2071 */ 2072 buf.Pointer = ¶m; 2073 buf.Length = sizeof(param); 2074 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2075 if (ACPI_SUCCESS(status)) { 2076 if (param.Type == ACPI_TYPE_INTEGER) 2077 *number = param.Integer.Value; 2078 else 2079 status = AE_TYPE; 2080 } 2081 2082 /* 2083 * In some applications, a method that's expected to return an Integer 2084 * may instead return a Buffer (probably to simplify some internal 2085 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2086 * convert it into an Integer as best we can. 2087 * 2088 * This is a hack. 2089 */ 2090 if (status == AE_BUFFER_OVERFLOW) { 2091 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2092 status = AE_NO_MEMORY; 2093 } else { 2094 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2095 if (ACPI_SUCCESS(status)) 2096 status = acpi_ConvertBufferToInteger(&buf, number); 2097 AcpiOsFree(buf.Pointer); 2098 } 2099 } 2100 return (status); 2101 } 2102 2103 ACPI_STATUS 2104 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2105 { 2106 ACPI_OBJECT *p; 2107 UINT8 *val; 2108 int i; 2109 2110 p = (ACPI_OBJECT *)bufp->Pointer; 2111 if (p->Type == ACPI_TYPE_INTEGER) { 2112 *number = p->Integer.Value; 2113 return (AE_OK); 2114 } 2115 if (p->Type != ACPI_TYPE_BUFFER) 2116 return (AE_TYPE); 2117 if (p->Buffer.Length > sizeof(int)) 2118 return (AE_BAD_DATA); 2119 2120 *number = 0; 2121 val = p->Buffer.Pointer; 2122 for (i = 0; i < p->Buffer.Length; i++) 2123 *number += val[i] << (i * 8); 2124 return (AE_OK); 2125 } 2126 2127 /* 2128 * Iterate over the elements of an a package object, calling the supplied 2129 * function for each element. 2130 * 2131 * XXX possible enhancement might be to abort traversal on error. 2132 */ 2133 ACPI_STATUS 2134 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2135 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2136 { 2137 ACPI_OBJECT *comp; 2138 int i; 2139 2140 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2141 return (AE_BAD_PARAMETER); 2142 2143 /* Iterate over components */ 2144 i = 0; 2145 comp = pkg->Package.Elements; 2146 for (; i < pkg->Package.Count; i++, comp++) 2147 func(comp, arg); 2148 2149 return (AE_OK); 2150 } 2151 2152 /* 2153 * Find the (index)th resource object in a set. 2154 */ 2155 ACPI_STATUS 2156 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2157 { 2158 ACPI_RESOURCE *rp; 2159 int i; 2160 2161 rp = (ACPI_RESOURCE *)buf->Pointer; 2162 i = index; 2163 while (i-- > 0) { 2164 /* Range check */ 2165 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2166 return (AE_BAD_PARAMETER); 2167 2168 /* Check for terminator */ 2169 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2170 return (AE_NOT_FOUND); 2171 rp = ACPI_NEXT_RESOURCE(rp); 2172 } 2173 if (resp != NULL) 2174 *resp = rp; 2175 2176 return (AE_OK); 2177 } 2178 2179 /* 2180 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2181 * 2182 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2183 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2184 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2185 * resources. 2186 */ 2187 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2188 2189 ACPI_STATUS 2190 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2191 { 2192 ACPI_RESOURCE *rp; 2193 void *newp; 2194 2195 /* Initialise the buffer if necessary. */ 2196 if (buf->Pointer == NULL) { 2197 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2198 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2199 return (AE_NO_MEMORY); 2200 rp = (ACPI_RESOURCE *)buf->Pointer; 2201 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2202 rp->Length = 0; 2203 } 2204 if (res == NULL) 2205 return (AE_OK); 2206 2207 /* 2208 * Scan the current buffer looking for the terminator. 2209 * This will either find the terminator or hit the end 2210 * of the buffer and return an error. 2211 */ 2212 rp = (ACPI_RESOURCE *)buf->Pointer; 2213 for (;;) { 2214 /* Range check, don't go outside the buffer */ 2215 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2216 return (AE_BAD_PARAMETER); 2217 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2218 break; 2219 rp = ACPI_NEXT_RESOURCE(rp); 2220 } 2221 2222 /* 2223 * Check the size of the buffer and expand if required. 2224 * 2225 * Required size is: 2226 * size of existing resources before terminator + 2227 * size of new resource and header + 2228 * size of terminator. 2229 * 2230 * Note that this loop should really only run once, unless 2231 * for some reason we are stuffing a *really* huge resource. 2232 */ 2233 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2234 res->Length + ACPI_RS_SIZE_NO_DATA + 2235 ACPI_RS_SIZE_MIN) >= buf->Length) { 2236 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2237 return (AE_NO_MEMORY); 2238 bcopy(buf->Pointer, newp, buf->Length); 2239 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2240 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2241 AcpiOsFree(buf->Pointer); 2242 buf->Pointer = newp; 2243 buf->Length += buf->Length; 2244 } 2245 2246 /* Insert the new resource. */ 2247 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2248 2249 /* And add the terminator. */ 2250 rp = ACPI_NEXT_RESOURCE(rp); 2251 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2252 rp->Length = 0; 2253 2254 return (AE_OK); 2255 } 2256 2257 /* 2258 * Set interrupt model. 2259 */ 2260 ACPI_STATUS 2261 acpi_SetIntrModel(int model) 2262 { 2263 2264 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2265 } 2266 2267 /* 2268 * DEPRECATED. This interface has serious deficiencies and will be 2269 * removed. 2270 * 2271 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2272 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2273 */ 2274 ACPI_STATUS 2275 acpi_SetSleepState(struct acpi_softc *sc, int state) 2276 { 2277 static int once; 2278 2279 if (!once) { 2280 printf( 2281 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2282 once = 1; 2283 } 2284 return (acpi_EnterSleepState(sc, state)); 2285 } 2286 2287 #if defined(__amd64__) || defined(__i386__) 2288 static void 2289 acpi_sleep_force(void *arg) 2290 { 2291 struct acpi_softc *sc; 2292 2293 printf("acpi: suspend request timed out, forcing sleep now\n"); 2294 sc = arg; 2295 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2296 printf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2297 } 2298 #endif 2299 2300 /* 2301 * Request that the system enter the given suspend state. All /dev/apm 2302 * devices and devd(8) will be notified. Userland then has a chance to 2303 * save state and acknowledge the request. The system sleeps once all 2304 * acks are in. 2305 */ 2306 int 2307 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2308 { 2309 #if defined(__i386__) 2310 struct apm_clone_data *clone; 2311 #endif 2312 2313 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2314 return (EINVAL); 2315 2316 /* S5 (soft-off) should be entered directly with no waiting. */ 2317 if (state == ACPI_STATE_S5) { 2318 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2319 return (0); 2320 else 2321 return (ENXIO); 2322 } 2323 2324 #if defined(__amd64__) || defined(__i386__) 2325 /* If a suspend request is already in progress, just return. */ 2326 ACPI_LOCK(acpi); 2327 if (sc->acpi_next_sstate != 0) { 2328 ACPI_UNLOCK(acpi); 2329 return (0); 2330 } 2331 2332 /* Record the pending state and notify all apm devices. */ 2333 sc->acpi_next_sstate = state; 2334 #if defined(__i386__) 2335 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2336 clone->notify_status = APM_EV_NONE; 2337 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2338 selwakeuppri(&clone->sel_read, PZERO); 2339 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2340 } 2341 } 2342 #endif 2343 2344 /* If devd(8) is not running, immediately enter the sleep state. */ 2345 if (!devctl_process_running()) { 2346 ACPI_UNLOCK(acpi); 2347 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2348 return (0); 2349 } else { 2350 return (ENXIO); 2351 } 2352 } 2353 2354 /* 2355 * Set a timeout to fire if userland doesn't ack the suspend request 2356 * in time. This way we still eventually go to sleep if we were 2357 * overheating or running low on battery, even if userland is hung. 2358 * We cancel this timeout once all userland acks are in or the 2359 * suspend request is aborted. 2360 */ 2361 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2362 ACPI_UNLOCK(acpi); 2363 2364 /* Now notify devd(8) also. */ 2365 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2366 2367 return (0); 2368 #else 2369 /* This platform does not support acpi suspend/resume. */ 2370 return (EOPNOTSUPP); 2371 #endif 2372 } 2373 2374 /* 2375 * Acknowledge (or reject) a pending sleep state. The caller has 2376 * prepared for suspend and is now ready for it to proceed. If the 2377 * error argument is non-zero, it indicates suspend should be cancelled 2378 * and gives an errno value describing why. Once all votes are in, 2379 * we suspend the system. 2380 */ 2381 int 2382 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2383 { 2384 #if defined(__amd64__) || defined(__i386__) 2385 struct acpi_softc *sc; 2386 int ret, sleeping; 2387 2388 /* If no pending sleep state, return an error. */ 2389 ACPI_LOCK(acpi); 2390 sc = clone->acpi_sc; 2391 if (sc->acpi_next_sstate == 0) { 2392 ACPI_UNLOCK(acpi); 2393 return (ENXIO); 2394 } 2395 2396 /* Caller wants to abort suspend process. */ 2397 if (error) { 2398 sc->acpi_next_sstate = 0; 2399 callout_stop(&sc->susp_force_to); 2400 printf("acpi: listener on %s cancelled the pending suspend\n", 2401 devtoname(clone->cdev)); 2402 ACPI_UNLOCK(acpi); 2403 return (0); 2404 } 2405 2406 /* 2407 * Mark this device as acking the suspend request. Then, walk through 2408 * all devices, seeing if they agree yet. We only count devices that 2409 * are writable since read-only devices couldn't ack the request. 2410 */ 2411 sleeping = TRUE; 2412 #if defined(__i386__) 2413 clone->notify_status = APM_EV_ACKED; 2414 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2415 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2416 clone->notify_status != APM_EV_ACKED) { 2417 sleeping = FALSE; 2418 break; 2419 } 2420 } 2421 #endif 2422 2423 /* If all devices have voted "yes", we will suspend now. */ 2424 if (sleeping) 2425 callout_stop(&sc->susp_force_to); 2426 ACPI_UNLOCK(acpi); 2427 ret = 0; 2428 if (sleeping) { 2429 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2430 ret = ENODEV; 2431 } 2432 return (ret); 2433 #else 2434 /* This platform does not support acpi suspend/resume. */ 2435 return (EOPNOTSUPP); 2436 #endif 2437 } 2438 2439 static void 2440 acpi_sleep_enable(void *arg) 2441 { 2442 struct acpi_softc *sc = (struct acpi_softc *)arg; 2443 2444 ACPI_LOCK(acpi); 2445 sc->acpi_sleep_disabled = 0; 2446 ACPI_UNLOCK(acpi); 2447 } 2448 2449 static ACPI_STATUS 2450 acpi_sleep_disable(struct acpi_softc *sc) 2451 { 2452 ACPI_STATUS status; 2453 2454 ACPI_LOCK(acpi); 2455 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2456 sc->acpi_sleep_disabled = 1; 2457 ACPI_UNLOCK(acpi); 2458 2459 return (status); 2460 } 2461 2462 enum acpi_sleep_state { 2463 ACPI_SS_NONE, 2464 ACPI_SS_GPE_SET, 2465 ACPI_SS_DEV_SUSPEND, 2466 ACPI_SS_SLP_PREP, 2467 ACPI_SS_SLEPT, 2468 }; 2469 2470 /* 2471 * Enter the desired system sleep state. 2472 * 2473 * Currently we support S1-S5 but S4 is only S4BIOS 2474 */ 2475 static ACPI_STATUS 2476 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2477 { 2478 ACPI_STATUS status; 2479 UINT8 TypeA; 2480 UINT8 TypeB; 2481 enum acpi_sleep_state slp_state; 2482 2483 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2484 2485 /* Re-entry once we're suspending is not allowed. */ 2486 status = acpi_sleep_disable(sc); 2487 if (ACPI_FAILURE(status)) { 2488 printf("acpi: suspend request ignored (not ready yet)\n"); 2489 return (status); 2490 } 2491 2492 #ifdef SMP 2493 thread_lock(curthread); 2494 sched_bind(curthread, 0); 2495 thread_unlock(curthread); 2496 #endif 2497 2498 /* 2499 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2500 * drivers need this. 2501 */ 2502 mtx_lock(&Giant); 2503 2504 slp_state = ACPI_SS_NONE; 2505 switch (state) { 2506 case ACPI_STATE_S1: 2507 case ACPI_STATE_S2: 2508 case ACPI_STATE_S3: 2509 case ACPI_STATE_S4: 2510 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2511 if (status == AE_NOT_FOUND) { 2512 device_printf(sc->acpi_dev, 2513 "Sleep state S%d not supported by BIOS\n", state); 2514 break; 2515 } else if (ACPI_FAILURE(status)) { 2516 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2517 AcpiFormatException(status)); 2518 break; 2519 } 2520 2521 sc->acpi_sstate = state; 2522 2523 /* Enable any GPEs as appropriate and requested by the user. */ 2524 acpi_wake_prep_walk(state); 2525 slp_state = ACPI_SS_GPE_SET; 2526 2527 /* 2528 * Inform all devices that we are going to sleep. If at least one 2529 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2530 * 2531 * XXX Note that a better two-pass approach with a 'veto' pass 2532 * followed by a "real thing" pass would be better, but the current 2533 * bus interface does not provide for this. 2534 */ 2535 if (DEVICE_SUSPEND(root_bus) != 0) { 2536 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2537 break; 2538 } 2539 slp_state = ACPI_SS_DEV_SUSPEND; 2540 2541 /* If testing device suspend only, back out of everything here. */ 2542 if (acpi_susp_bounce) 2543 break; 2544 2545 status = AcpiEnterSleepStatePrep(state); 2546 if (ACPI_FAILURE(status)) { 2547 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2548 AcpiFormatException(status)); 2549 break; 2550 } 2551 slp_state = ACPI_SS_SLP_PREP; 2552 2553 if (sc->acpi_sleep_delay > 0) 2554 DELAY(sc->acpi_sleep_delay * 1000000); 2555 2556 if (state != ACPI_STATE_S1) { 2557 acpi_sleep_machdep(sc, state); 2558 2559 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2560 if (state == ACPI_STATE_S4) 2561 AcpiEnable(); 2562 } else { 2563 ACPI_DISABLE_IRQS(); 2564 status = AcpiEnterSleepState(state); 2565 if (ACPI_FAILURE(status)) { 2566 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2567 AcpiFormatException(status)); 2568 break; 2569 } 2570 } 2571 slp_state = ACPI_SS_SLEPT; 2572 break; 2573 case ACPI_STATE_S5: 2574 /* 2575 * Shut down cleanly and power off. This will call us back through the 2576 * shutdown handlers. 2577 */ 2578 shutdown_nice(RB_POWEROFF); 2579 status = AE_OK; 2580 break; 2581 case ACPI_STATE_S0: 2582 default: 2583 status = AE_BAD_PARAMETER; 2584 break; 2585 } 2586 2587 /* 2588 * Back out state according to how far along we got in the suspend 2589 * process. This handles both the error and success cases. 2590 */ 2591 sc->acpi_next_sstate = 0; 2592 if (slp_state >= ACPI_SS_GPE_SET) { 2593 acpi_wake_prep_walk(state); 2594 sc->acpi_sstate = ACPI_STATE_S0; 2595 } 2596 if (slp_state >= ACPI_SS_SLP_PREP) 2597 AcpiLeaveSleepState(state); 2598 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2599 DEVICE_RESUME(root_bus); 2600 if (slp_state >= ACPI_SS_SLEPT) 2601 acpi_enable_fixed_events(sc); 2602 2603 mtx_unlock(&Giant); 2604 2605 #ifdef SMP 2606 thread_lock(curthread); 2607 sched_unbind(curthread); 2608 thread_unlock(curthread); 2609 #endif 2610 2611 /* Allow another sleep request after a while. */ 2612 if (state != ACPI_STATE_S5) 2613 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2614 2615 /* Run /etc/rc.resume after we are back. */ 2616 if (devctl_process_running()) 2617 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2618 2619 return_ACPI_STATUS (status); 2620 } 2621 2622 void 2623 acpi_resync_clock(struct acpi_softc *sc) 2624 { 2625 2626 if (!acpi_reset_clock) 2627 return; 2628 2629 /* 2630 * Warm up timecounter again and reset system clock. 2631 */ 2632 (void)timecounter->tc_get_timecount(timecounter); 2633 (void)timecounter->tc_get_timecount(timecounter); 2634 inittodr(time_second + sc->acpi_sleep_delay); 2635 } 2636 2637 /* Initialize a device's wake GPE. */ 2638 int 2639 acpi_wake_init(device_t dev, int type) 2640 { 2641 struct acpi_prw_data prw; 2642 2643 /* Evaluate _PRW to find the GPE. */ 2644 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2645 return (ENXIO); 2646 2647 /* Set the requested type for the GPE (runtime, wake, or both). */ 2648 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2649 device_printf(dev, "set GPE type failed\n"); 2650 return (ENXIO); 2651 } 2652 2653 return (0); 2654 } 2655 2656 /* Enable or disable the device's wake GPE. */ 2657 int 2658 acpi_wake_set_enable(device_t dev, int enable) 2659 { 2660 struct acpi_prw_data prw; 2661 ACPI_STATUS status; 2662 int flags; 2663 2664 /* Make sure the device supports waking the system and get the GPE. */ 2665 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2666 return (ENXIO); 2667 2668 flags = acpi_get_flags(dev); 2669 if (enable) { 2670 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2671 if (ACPI_FAILURE(status)) { 2672 device_printf(dev, "enable wake failed\n"); 2673 return (ENXIO); 2674 } 2675 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2676 } else { 2677 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2678 if (ACPI_FAILURE(status)) { 2679 device_printf(dev, "disable wake failed\n"); 2680 return (ENXIO); 2681 } 2682 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2683 } 2684 2685 return (0); 2686 } 2687 2688 static int 2689 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2690 { 2691 struct acpi_prw_data prw; 2692 device_t dev; 2693 2694 /* Check that this is a wake-capable device and get its GPE. */ 2695 if (acpi_parse_prw(handle, &prw) != 0) 2696 return (ENXIO); 2697 dev = acpi_get_device(handle); 2698 2699 /* 2700 * The destination sleep state must be less than (i.e., higher power) 2701 * or equal to the value specified by _PRW. If this GPE cannot be 2702 * enabled for the next sleep state, then disable it. If it can and 2703 * the user requested it be enabled, turn on any required power resources 2704 * and set _PSW. 2705 */ 2706 if (sstate > prw.lowest_wake) { 2707 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2708 if (bootverbose) 2709 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2710 acpi_name(handle), sstate); 2711 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2712 acpi_pwr_wake_enable(handle, 1); 2713 acpi_SetInteger(handle, "_PSW", 1); 2714 if (bootverbose) 2715 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2716 acpi_name(handle), sstate); 2717 } 2718 2719 return (0); 2720 } 2721 2722 static int 2723 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2724 { 2725 struct acpi_prw_data prw; 2726 device_t dev; 2727 2728 /* 2729 * Check that this is a wake-capable device and get its GPE. Return 2730 * now if the user didn't enable this device for wake. 2731 */ 2732 if (acpi_parse_prw(handle, &prw) != 0) 2733 return (ENXIO); 2734 dev = acpi_get_device(handle); 2735 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2736 return (0); 2737 2738 /* 2739 * If this GPE couldn't be enabled for the previous sleep state, it was 2740 * disabled before going to sleep so re-enable it. If it was enabled, 2741 * clear _PSW and turn off any power resources it used. 2742 */ 2743 if (sstate > prw.lowest_wake) { 2744 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2745 if (bootverbose) 2746 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2747 } else { 2748 acpi_SetInteger(handle, "_PSW", 0); 2749 acpi_pwr_wake_enable(handle, 0); 2750 if (bootverbose) 2751 device_printf(dev, "run_prep cleaned up for %s\n", 2752 acpi_name(handle)); 2753 } 2754 2755 return (0); 2756 } 2757 2758 static ACPI_STATUS 2759 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2760 { 2761 int sstate; 2762 2763 /* If suspending, run the sleep prep function, otherwise wake. */ 2764 sstate = *(int *)context; 2765 if (AcpiGbl_SystemAwakeAndRunning) 2766 acpi_wake_sleep_prep(handle, sstate); 2767 else 2768 acpi_wake_run_prep(handle, sstate); 2769 return (AE_OK); 2770 } 2771 2772 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2773 static int 2774 acpi_wake_prep_walk(int sstate) 2775 { 2776 ACPI_HANDLE sb_handle; 2777 2778 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2779 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2780 acpi_wake_prep, &sstate, NULL); 2781 return (0); 2782 } 2783 2784 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2785 static int 2786 acpi_wake_sysctl_walk(device_t dev) 2787 { 2788 int error, i, numdevs; 2789 device_t *devlist; 2790 device_t child; 2791 ACPI_STATUS status; 2792 2793 error = device_get_children(dev, &devlist, &numdevs); 2794 if (error != 0 || numdevs == 0) { 2795 if (numdevs == 0) 2796 free(devlist, M_TEMP); 2797 return (error); 2798 } 2799 for (i = 0; i < numdevs; i++) { 2800 child = devlist[i]; 2801 acpi_wake_sysctl_walk(child); 2802 if (!device_is_attached(child)) 2803 continue; 2804 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2805 if (ACPI_SUCCESS(status)) { 2806 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2807 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2808 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2809 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2810 } 2811 } 2812 free(devlist, M_TEMP); 2813 2814 return (0); 2815 } 2816 2817 /* Enable or disable wake from userland. */ 2818 static int 2819 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2820 { 2821 int enable, error; 2822 device_t dev; 2823 2824 dev = (device_t)arg1; 2825 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2826 2827 error = sysctl_handle_int(oidp, &enable, 0, req); 2828 if (error != 0 || req->newptr == NULL) 2829 return (error); 2830 if (enable != 0 && enable != 1) 2831 return (EINVAL); 2832 2833 return (acpi_wake_set_enable(dev, enable)); 2834 } 2835 2836 /* Parse a device's _PRW into a structure. */ 2837 int 2838 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2839 { 2840 ACPI_STATUS status; 2841 ACPI_BUFFER prw_buffer; 2842 ACPI_OBJECT *res, *res2; 2843 int error, i, power_count; 2844 2845 if (h == NULL || prw == NULL) 2846 return (EINVAL); 2847 2848 /* 2849 * The _PRW object (7.2.9) is only required for devices that have the 2850 * ability to wake the system from a sleeping state. 2851 */ 2852 error = EINVAL; 2853 prw_buffer.Pointer = NULL; 2854 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2855 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2856 if (ACPI_FAILURE(status)) 2857 return (ENOENT); 2858 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2859 if (res == NULL) 2860 return (ENOENT); 2861 if (!ACPI_PKG_VALID(res, 2)) 2862 goto out; 2863 2864 /* 2865 * Element 1 of the _PRW object: 2866 * The lowest power system sleeping state that can be entered while still 2867 * providing wake functionality. The sleeping state being entered must 2868 * be less than (i.e., higher power) or equal to this value. 2869 */ 2870 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2871 goto out; 2872 2873 /* 2874 * Element 0 of the _PRW object: 2875 */ 2876 switch (res->Package.Elements[0].Type) { 2877 case ACPI_TYPE_INTEGER: 2878 /* 2879 * If the data type of this package element is numeric, then this 2880 * _PRW package element is the bit index in the GPEx_EN, in the 2881 * GPE blocks described in the FADT, of the enable bit that is 2882 * enabled for the wake event. 2883 */ 2884 prw->gpe_handle = NULL; 2885 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2886 error = 0; 2887 break; 2888 case ACPI_TYPE_PACKAGE: 2889 /* 2890 * If the data type of this package element is a package, then this 2891 * _PRW package element is itself a package containing two 2892 * elements. The first is an object reference to the GPE Block 2893 * device that contains the GPE that will be triggered by the wake 2894 * event. The second element is numeric and it contains the bit 2895 * index in the GPEx_EN, in the GPE Block referenced by the 2896 * first element in the package, of the enable bit that is enabled for 2897 * the wake event. 2898 * 2899 * For example, if this field is a package then it is of the form: 2900 * Package() {\_SB.PCI0.ISA.GPE, 2} 2901 */ 2902 res2 = &res->Package.Elements[0]; 2903 if (!ACPI_PKG_VALID(res2, 2)) 2904 goto out; 2905 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2906 if (prw->gpe_handle == NULL) 2907 goto out; 2908 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2909 goto out; 2910 error = 0; 2911 break; 2912 default: 2913 goto out; 2914 } 2915 2916 /* Elements 2 to N of the _PRW object are power resources. */ 2917 power_count = res->Package.Count - 2; 2918 if (power_count > ACPI_PRW_MAX_POWERRES) { 2919 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2920 power_count = 0; 2921 } 2922 prw->power_res_count = power_count; 2923 for (i = 0; i < power_count; i++) 2924 prw->power_res[i] = res->Package.Elements[i]; 2925 2926 out: 2927 if (prw_buffer.Pointer != NULL) 2928 AcpiOsFree(prw_buffer.Pointer); 2929 return (error); 2930 } 2931 2932 /* 2933 * ACPI Event Handlers 2934 */ 2935 2936 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2937 2938 static void 2939 acpi_system_eventhandler_sleep(void *arg, int state) 2940 { 2941 int ret; 2942 2943 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2944 2945 /* Check if button action is disabled. */ 2946 if (state == ACPI_S_STATES_MAX + 1) 2947 return; 2948 2949 /* Request that the system prepare to enter the given suspend state. */ 2950 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2951 if (ret != 0) 2952 printf("acpi: request to enter state S%d failed (err %d)\n", 2953 state, ret); 2954 2955 return_VOID; 2956 } 2957 2958 static void 2959 acpi_system_eventhandler_wakeup(void *arg, int state) 2960 { 2961 2962 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2963 2964 /* Currently, nothing to do for wakeup. */ 2965 2966 return_VOID; 2967 } 2968 2969 /* 2970 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2971 */ 2972 UINT32 2973 acpi_event_power_button_sleep(void *context) 2974 { 2975 struct acpi_softc *sc = (struct acpi_softc *)context; 2976 2977 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2978 2979 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2980 2981 return_VALUE (ACPI_INTERRUPT_HANDLED); 2982 } 2983 2984 UINT32 2985 acpi_event_power_button_wake(void *context) 2986 { 2987 struct acpi_softc *sc = (struct acpi_softc *)context; 2988 2989 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2990 2991 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2992 2993 return_VALUE (ACPI_INTERRUPT_HANDLED); 2994 } 2995 2996 UINT32 2997 acpi_event_sleep_button_sleep(void *context) 2998 { 2999 struct acpi_softc *sc = (struct acpi_softc *)context; 3000 3001 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3002 3003 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3004 3005 return_VALUE (ACPI_INTERRUPT_HANDLED); 3006 } 3007 3008 UINT32 3009 acpi_event_sleep_button_wake(void *context) 3010 { 3011 struct acpi_softc *sc = (struct acpi_softc *)context; 3012 3013 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3014 3015 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3016 3017 return_VALUE (ACPI_INTERRUPT_HANDLED); 3018 } 3019 3020 /* 3021 * XXX This static buffer is suboptimal. There is no locking so only 3022 * use this for single-threaded callers. 3023 */ 3024 char * 3025 acpi_name(ACPI_HANDLE handle) 3026 { 3027 ACPI_BUFFER buf; 3028 static char data[256]; 3029 3030 buf.Length = sizeof(data); 3031 buf.Pointer = data; 3032 3033 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3034 return (data); 3035 return ("(unknown)"); 3036 } 3037 3038 /* 3039 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3040 * parts of the namespace. 3041 */ 3042 int 3043 acpi_avoid(ACPI_HANDLE handle) 3044 { 3045 char *cp, *env, *np; 3046 int len; 3047 3048 np = acpi_name(handle); 3049 if (*np == '\\') 3050 np++; 3051 if ((env = getenv("debug.acpi.avoid")) == NULL) 3052 return (0); 3053 3054 /* Scan the avoid list checking for a match */ 3055 cp = env; 3056 for (;;) { 3057 while (*cp != 0 && isspace(*cp)) 3058 cp++; 3059 if (*cp == 0) 3060 break; 3061 len = 0; 3062 while (cp[len] != 0 && !isspace(cp[len])) 3063 len++; 3064 if (!strncmp(cp, np, len)) { 3065 freeenv(env); 3066 return(1); 3067 } 3068 cp += len; 3069 } 3070 freeenv(env); 3071 3072 return (0); 3073 } 3074 3075 /* 3076 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3077 */ 3078 int 3079 acpi_disabled(char *subsys) 3080 { 3081 char *cp, *env; 3082 int len; 3083 3084 if ((env = getenv("debug.acpi.disabled")) == NULL) 3085 return (0); 3086 if (strcmp(env, "all") == 0) { 3087 freeenv(env); 3088 return (1); 3089 } 3090 3091 /* Scan the disable list, checking for a match. */ 3092 cp = env; 3093 for (;;) { 3094 while (*cp != '\0' && isspace(*cp)) 3095 cp++; 3096 if (*cp == '\0') 3097 break; 3098 len = 0; 3099 while (cp[len] != '\0' && !isspace(cp[len])) 3100 len++; 3101 if (strncmp(cp, subsys, len) == 0) { 3102 freeenv(env); 3103 return (1); 3104 } 3105 cp += len; 3106 } 3107 freeenv(env); 3108 3109 return (0); 3110 } 3111 3112 /* 3113 * Control interface. 3114 * 3115 * We multiplex ioctls for all participating ACPI devices here. Individual 3116 * drivers wanting to be accessible via /dev/acpi should use the 3117 * register/deregister interface to make their handlers visible. 3118 */ 3119 struct acpi_ioctl_hook 3120 { 3121 TAILQ_ENTRY(acpi_ioctl_hook) link; 3122 u_long cmd; 3123 acpi_ioctl_fn fn; 3124 void *arg; 3125 }; 3126 3127 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3128 static int acpi_ioctl_hooks_initted; 3129 3130 int 3131 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3132 { 3133 struct acpi_ioctl_hook *hp; 3134 3135 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3136 return (ENOMEM); 3137 hp->cmd = cmd; 3138 hp->fn = fn; 3139 hp->arg = arg; 3140 3141 ACPI_LOCK(acpi); 3142 if (acpi_ioctl_hooks_initted == 0) { 3143 TAILQ_INIT(&acpi_ioctl_hooks); 3144 acpi_ioctl_hooks_initted = 1; 3145 } 3146 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3147 ACPI_UNLOCK(acpi); 3148 3149 return (0); 3150 } 3151 3152 void 3153 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3154 { 3155 struct acpi_ioctl_hook *hp; 3156 3157 ACPI_LOCK(acpi); 3158 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3159 if (hp->cmd == cmd && hp->fn == fn) 3160 break; 3161 3162 if (hp != NULL) { 3163 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3164 free(hp, M_ACPIDEV); 3165 } 3166 ACPI_UNLOCK(acpi); 3167 } 3168 3169 static int 3170 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 3171 { 3172 return (0); 3173 } 3174 3175 static int 3176 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 3177 { 3178 return (0); 3179 } 3180 3181 static int 3182 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 3183 { 3184 struct acpi_softc *sc; 3185 struct acpi_ioctl_hook *hp; 3186 int error, state; 3187 3188 error = 0; 3189 hp = NULL; 3190 sc = dev->si_drv1; 3191 3192 /* 3193 * Scan the list of registered ioctls, looking for handlers. 3194 */ 3195 ACPI_LOCK(acpi); 3196 if (acpi_ioctl_hooks_initted) 3197 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3198 if (hp->cmd == cmd) 3199 break; 3200 } 3201 ACPI_UNLOCK(acpi); 3202 if (hp) 3203 return (hp->fn(cmd, addr, hp->arg)); 3204 3205 /* 3206 * Core ioctls are not permitted for non-writable user. 3207 * Currently, other ioctls just fetch information. 3208 * Not changing system behavior. 3209 */ 3210 if ((flag & FWRITE) == 0) 3211 return (EPERM); 3212 3213 /* Core system ioctls. */ 3214 switch (cmd) { 3215 case ACPIIO_REQSLPSTATE: 3216 state = *(int *)addr; 3217 if (state != ACPI_STATE_S5) 3218 error = acpi_ReqSleepState(sc, state); 3219 else { 3220 printf("power off via acpi ioctl not supported\n"); 3221 error = ENXIO; 3222 } 3223 break; 3224 case ACPIIO_ACKSLPSTATE: 3225 error = *(int *)addr; 3226 error = acpi_AckSleepState(sc->acpi_clone, error); 3227 break; 3228 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3229 error = EINVAL; 3230 state = *(int *)addr; 3231 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3232 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3233 error = 0; 3234 break; 3235 default: 3236 error = ENXIO; 3237 break; 3238 } 3239 3240 return (error); 3241 } 3242 3243 static int 3244 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3245 { 3246 int error; 3247 struct sbuf sb; 3248 UINT8 state, TypeA, TypeB; 3249 3250 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3251 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3252 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3253 sbuf_printf(&sb, "S%d ", state); 3254 sbuf_trim(&sb); 3255 sbuf_finish(&sb); 3256 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3257 sbuf_delete(&sb); 3258 return (error); 3259 } 3260 3261 static int 3262 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3263 { 3264 char sleep_state[10]; 3265 int error; 3266 u_int new_state, old_state; 3267 3268 old_state = *(u_int *)oidp->oid_arg1; 3269 if (old_state > ACPI_S_STATES_MAX + 1) 3270 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3271 else 3272 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3273 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3274 if (error == 0 && req->newptr != NULL) { 3275 new_state = ACPI_STATE_S0; 3276 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3277 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3278 break; 3279 if (new_state <= ACPI_S_STATES_MAX + 1) { 3280 if (new_state != old_state) 3281 *(u_int *)oidp->oid_arg1 = new_state; 3282 } else 3283 error = EINVAL; 3284 } 3285 3286 return (error); 3287 } 3288 3289 /* Inform devctl(4) when we receive a Notify. */ 3290 void 3291 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3292 { 3293 char notify_buf[16]; 3294 ACPI_BUFFER handle_buf; 3295 ACPI_STATUS status; 3296 3297 if (subsystem == NULL) 3298 return; 3299 3300 handle_buf.Pointer = NULL; 3301 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3302 status = AcpiNsHandleToPathname(h, &handle_buf); 3303 if (ACPI_FAILURE(status)) 3304 return; 3305 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3306 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3307 AcpiOsFree(handle_buf.Pointer); 3308 } 3309 3310 #ifdef ACPI_DEBUG 3311 /* 3312 * Support for parsing debug options from the kernel environment. 3313 * 3314 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3315 * by specifying the names of the bits in the debug.acpi.layer and 3316 * debug.acpi.level environment variables. Bits may be unset by 3317 * prefixing the bit name with !. 3318 */ 3319 struct debugtag 3320 { 3321 char *name; 3322 UINT32 value; 3323 }; 3324 3325 static struct debugtag dbg_layer[] = { 3326 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3327 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3328 {"ACPI_EVENTS", ACPI_EVENTS}, 3329 {"ACPI_TABLES", ACPI_TABLES}, 3330 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3331 {"ACPI_PARSER", ACPI_PARSER}, 3332 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3333 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3334 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3335 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3336 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3337 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3338 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3339 3340 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3341 {"ACPI_BATTERY", ACPI_BATTERY}, 3342 {"ACPI_BUS", ACPI_BUS}, 3343 {"ACPI_BUTTON", ACPI_BUTTON}, 3344 {"ACPI_EC", ACPI_EC}, 3345 {"ACPI_FAN", ACPI_FAN}, 3346 {"ACPI_POWERRES", ACPI_POWERRES}, 3347 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3348 {"ACPI_THERMAL", ACPI_THERMAL}, 3349 {"ACPI_TIMER", ACPI_TIMER}, 3350 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3351 {NULL, 0} 3352 }; 3353 3354 static struct debugtag dbg_level[] = { 3355 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 3356 {"ACPI_LV_WARN", ACPI_LV_WARN}, 3357 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3358 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3359 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3360 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3361 3362 /* Trace verbosity level 1 [Standard Trace Level] */ 3363 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3364 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3365 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3366 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3367 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3368 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3369 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3370 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3371 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3372 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3373 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3374 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3375 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3376 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3377 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3378 3379 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3380 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3381 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3382 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3383 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3384 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3385 3386 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3387 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3388 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3389 {"ACPI_LV_IO", ACPI_LV_IO}, 3390 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3391 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3392 3393 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3394 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3395 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3396 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3397 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3398 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3399 {NULL, 0} 3400 }; 3401 3402 static void 3403 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3404 { 3405 char *ep; 3406 int i, l; 3407 int set; 3408 3409 while (*cp) { 3410 if (isspace(*cp)) { 3411 cp++; 3412 continue; 3413 } 3414 ep = cp; 3415 while (*ep && !isspace(*ep)) 3416 ep++; 3417 if (*cp == '!') { 3418 set = 0; 3419 cp++; 3420 if (cp == ep) 3421 continue; 3422 } else { 3423 set = 1; 3424 } 3425 l = ep - cp; 3426 for (i = 0; tag[i].name != NULL; i++) { 3427 if (!strncmp(cp, tag[i].name, l)) { 3428 if (set) 3429 *flag |= tag[i].value; 3430 else 3431 *flag &= ~tag[i].value; 3432 } 3433 } 3434 cp = ep; 3435 } 3436 } 3437 3438 static void 3439 acpi_set_debugging(void *junk) 3440 { 3441 char *layer, *level; 3442 3443 if (cold) { 3444 AcpiDbgLayer = 0; 3445 AcpiDbgLevel = 0; 3446 } 3447 3448 layer = getenv("debug.acpi.layer"); 3449 level = getenv("debug.acpi.level"); 3450 if (layer == NULL && level == NULL) 3451 return; 3452 3453 printf("ACPI set debug"); 3454 if (layer != NULL) { 3455 if (strcmp("NONE", layer) != 0) 3456 printf(" layer '%s'", layer); 3457 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3458 freeenv(layer); 3459 } 3460 if (level != NULL) { 3461 if (strcmp("NONE", level) != 0) 3462 printf(" level '%s'", level); 3463 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3464 freeenv(level); 3465 } 3466 printf("\n"); 3467 } 3468 3469 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3470 NULL); 3471 3472 static int 3473 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3474 { 3475 int error, *dbg; 3476 struct debugtag *tag; 3477 struct sbuf sb; 3478 3479 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3480 return (ENOMEM); 3481 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3482 tag = &dbg_layer[0]; 3483 dbg = &AcpiDbgLayer; 3484 } else { 3485 tag = &dbg_level[0]; 3486 dbg = &AcpiDbgLevel; 3487 } 3488 3489 /* Get old values if this is a get request. */ 3490 ACPI_SERIAL_BEGIN(acpi); 3491 if (*dbg == 0) { 3492 sbuf_cpy(&sb, "NONE"); 3493 } else if (req->newptr == NULL) { 3494 for (; tag->name != NULL; tag++) { 3495 if ((*dbg & tag->value) == tag->value) 3496 sbuf_printf(&sb, "%s ", tag->name); 3497 } 3498 } 3499 sbuf_trim(&sb); 3500 sbuf_finish(&sb); 3501 3502 /* Copy out the old values to the user. */ 3503 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3504 sbuf_delete(&sb); 3505 3506 /* If the user is setting a string, parse it. */ 3507 if (error == 0 && req->newptr != NULL) { 3508 *dbg = 0; 3509 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3510 acpi_set_debugging(NULL); 3511 } 3512 ACPI_SERIAL_END(acpi); 3513 3514 return (error); 3515 } 3516 3517 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3518 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3519 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3520 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3521 #endif /* ACPI_DEBUG */ 3522 3523 static int 3524 acpi_pm_func(u_long cmd, void *arg, ...) 3525 { 3526 int state, acpi_state; 3527 int error; 3528 struct acpi_softc *sc; 3529 va_list ap; 3530 3531 error = 0; 3532 switch (cmd) { 3533 case POWER_CMD_SUSPEND: 3534 sc = (struct acpi_softc *)arg; 3535 if (sc == NULL) { 3536 error = EINVAL; 3537 goto out; 3538 } 3539 3540 va_start(ap, arg); 3541 state = va_arg(ap, int); 3542 va_end(ap); 3543 3544 switch (state) { 3545 case POWER_SLEEP_STATE_STANDBY: 3546 acpi_state = sc->acpi_standby_sx; 3547 break; 3548 case POWER_SLEEP_STATE_SUSPEND: 3549 acpi_state = sc->acpi_suspend_sx; 3550 break; 3551 case POWER_SLEEP_STATE_HIBERNATE: 3552 acpi_state = ACPI_STATE_S4; 3553 break; 3554 default: 3555 error = EINVAL; 3556 goto out; 3557 } 3558 3559 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3560 error = ENXIO; 3561 break; 3562 default: 3563 error = EINVAL; 3564 goto out; 3565 } 3566 3567 out: 3568 return (error); 3569 } 3570 3571 static void 3572 acpi_pm_register(void *arg) 3573 { 3574 if (!cold || resource_disabled("acpi", 0)) 3575 return; 3576 3577 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3578 } 3579 3580 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3581